Maximilian Schell
Dr. Hans Reinhardt
Acting
Anthony Perkins
Dr. Alex Durant
Acting
Robert Forster
Captain Dan Holland
Acting
Joseph Bottoms
Lieutenant Charles Pizer
Acting
Yvette Mimieux
Dr. Kate McCrae
Acting
Ernest Borgnine
Harry Booth
Acting
Tom McLoughlin
Captain S.T.A.R.
Directing
Roddy McDowall
V.I.N.CENT. (voice) (uncredited)
Acting
Slim Pickens
B.O.B. (voice) (uncredited)
Acting
Gary Nelson
Drone with Mask Removed (uncredited)
Directing
Steven Banks
Sentry Robot (uncredited)
Writing
Don Lewis
Sentry Robot (uncredited)
Acting